To understand a concept we have to know what it is and what it is not.
My statement is a concept. It itself can't stand alone if nobody questions it. If no one questioned it (inclusive myself), a discussion would simply not exist, therefore no concept to discuss. No discussion with other people and no discussion inside my own mind with myself.
Why is it possible me to be able to question this way inside my mind with myself?
It comes with the consensus reality. We as humans question it fantasizing about a potential for dream / illusion. Therefore we have a concept for reality. If we wouldn't be suspicious about the possibility of illusion / dream there would be no concept for reality. Dreaming, that makes us suspicious when we wake up sometimes remembering it, makes us self-conscious in the waking life. Dreaming is a natural practice for self-consciousness.
For myself to have an identity, there has to be others (not necessarily human),
for reality, there has to be dream,
for night, there has to be day,
for wakefulness, there has to be sleep.
for the concept of concept, there has to be concept of no-concept.
But all this is just so in the antropospheric dimension (and not so).
The all at once, ceases time. It is the infinite zero, the all encompassing paradox.